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首页> 外文期刊>Marine pollution bulletin >Long-term variation of the macrobenthic community and its relationship with environmental factors in the Yangtze River estuary and its adjacent area
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Long-term variation of the macrobenthic community and its relationship with environmental factors in the Yangtze River estuary and its adjacent area

机译：长江口及周边地区大型底栖动物群落的长期变化及其与环境因子的关系

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摘要

Using data from four periods from 1959 to 2015, we report the long-term variation of the macrobenthic community in the Yangtze River estuary and its adjacent area. In total, 624 species were collected, and Polychaeta was the dominant group. Significant differences between the four periods were found. The CCA (canonical correspondence analysis) and RDA (redundancy analysis) results revealed that temperature, salinity, and depth significantly influenced the macrobenthic communities (89.6% of the species-environment relationship variance was explained by the first two axes of CCA and 94.3% was explained by RDA). The results of K-dominance curves (the elevation increased over time),ABC (abundance/biomass comparison) curves (the W value changed from 0.311 to 0.167 during 1959 to 2014-2015) and the Shannon-Wiener index (log base = 2; 2.29-5.03 in 1959, 2.86-4.55 in 2000-2001, 2.28-4.56 in 2011-2012, and 179-4.43 in 2014-2015) showed that the ecological status of the benthic study area was deteriorating.
机译：利用1959年至2015年的四个时期的数据，我们报告了长江口及其附近地区大型底栖动物群落的长期变化。总共收集了624种，Polychaeta是主要种群。发现四个时期之间的显着差异。 CCA（规范对应分析）和RDA（冗余分析）结果表明，温度，盐度和深度显着影响大型底栖动物群落（CCA的前两个轴解释了89.6％的物种-环境关系方差，而94.3％由RDA解释）。 K主导曲线（海拔随时间增加），ABC（丰度/生物量比较）曲线（1959年至2014-2015年间W值从0.311变为0.167）和Shannon-Wiener指数（对数基数= 2）的结果； 1959年的2.29-5.03、2000-2001年的2.86-4.55、2011-2012年的2.28-4.56和2014-2015年的179-4.43）表明底栖研究区的生态状况正在恶化。

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